add support for additional build-types, e.g., ros2 pkg create --build-type anewbuildtype

[wayneparrott]

This enhancement request is to enable the creation of packages for build-types other than c/c++ and python, i.e.,ros2 pkg create --build-type mynewbuildtype

Specifically I'm proposing the addition of an extension point for additional build-types. Something like this:

entry_points={
        'ros2cli.extension_point': [
            'ros2pkg.build_type = ros2pkg.build_type:BuildTypeExtension',
        ],

As an experiment I implemented this extension point and it was quite simple to work into ros2pkg.verb.command.py with minimal changes, no refactoring of existing build-types required. I've been using my implementation for creating javascript/rclnodejs projects. I would be glad to share a PR for your consideration. If included in ros2cli, we (the rclnodejs team) will release a new build type for creating nodejs projects that properly work with ros2 run and ros2 launch commands.

Thoughts?

[dirk-thomas]

That sounds great. Please create a PR with that proposal.

[wayneparrott]

@ivanpauno I'm in the process of prep'ing a PR for this enhancement. I'm blocked with a dev environment issue running the ros2pkg/test_cli.py tests. Once I can run those tests successfully I'll submit the PR for review.

[ivanpauno]

@ivanpauno I'm in the process of prep'ing a PR for this enhancement. I'm blocked with a dev environment issue running the ros2pkg/test_cli.py tests. Once I can run those tests successfully I'll submit the PR for review.

Sounds great, let us know if you have any question.

[ros-discourse]

This issue has been mentioned on ROS Discourse. There might be relevant details there:

https://discourse.ros.org/t/proposal-ability-to-add-new-build-types-to-ros2cli-e-g-ros2-pkg-create-build-type-newbuildtype/13259/1